Iphone video upside down
 

Well, I hold my phone with volume buttons looking upwards when I record my videos.
Many users say that this is not the right way to hold the phone while recording but others say (including myself) that this is the... logic way.

The problem is that BSplayer and media player classic play them upside down while VLC and Windows Media Player play them fine!

I suspect that this is a codec issue. If so, which codec should I use? I use currently CCP codec.